CN117395580B - Efficient and directional deflectable directional sound production screen - Google Patents
Efficient and directional deflectable directional sound production screen Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a high-efficiency directional sound-emitting screen which is capable of deflecting and comprises a vibration layer and a non-vibration layer, wherein first conductive patterns are formed on the vibration layer, and each first conductive pattern comprises a plurality of first conductive channels which extend along a first direction and are spaced apart from each other in an insulating manner; the non-vibration layer is provided with a second conductive pattern, and the second conductive pattern comprises a plurality of second conductive channels which extend and are distributed along a second direction and are insulated and spaced apart; after the vibration layer is attached to the non-vibration layer, the first conductive channels and the second conductive channels are intersected and overlapped to form a plurality of sounding areas, and each sounding area independently sounds and/or randomly makes a combined sound with at least one other sounding area under the driving of an external driving signal. The invention realizes the deflection of the directivity of the directional sound emitting screen and reduces the power consumption required by the whole.
Description
Technical Field
The invention relates to the technical field of directional sound production of screens, in particular to a high-efficiency directional sound production screen capable of deflecting in a pointing direction.
Background
The ultra-thin, narrow bezel, and even full screen design of the display device leaves less and less room for the sound emitting device. While the conventional sound emitting device is large in size, the installation position is limited, and it is difficult to have a proper position and space in the new generation of display devices. Therefore, there is a need to redesign sound emitting devices that can accommodate the needs of current display devices.
Some manufacturers of display devices design a mode of sounding with a screen, and the screen sounding technology is used as a surface audio technology, so that a new solution is provided for the sound of the multimedia audio-visual equipment. At present, a transparent screen directional loudspeaker combining a display device and a screen sounding device is under development, screen self vibration is utilized as the loudspeaker, the resonant cavity space of the traditional loudspeaker is saved, and meanwhile, the directional propagation characteristic meets the privacy requirement of personal electronic equipment and the mutual noninterference requirement of public equipment.
However, the sounding area of the existing screen sounding device is a whole-surface sounding, that is, the sounding area occupies a visual area of the whole screen in a 1:1 design, and the sounding efficiency of the design is higher for a small screen (such as a size of less than 14 inches). However, for large screens (e.g., greater than 14 inches), if the entire viewable area is designed to produce sound, the power consumption is much higher than for small screens below 14 inches, and an increase in the magnitude of the system power consumption results in a higher system power consumption and, in turn, a reduced product life.
In addition, in order to realize the directional deflection of the sound field of the screen sound generating device, the screen sound generating device is generally divided into a plurality of sound generating channels, and the ultrasonic waves emitted by the screen sound generating device are deflected and focused by adjusting the time delay and the phase of each channel, so that the sound beam is emitted to the receiver in a directional manner.
However, the phase of each channel is adjusted by adopting multi-channel signal processing, the distance between the channels needs to be controlled to be smaller than the wavelength corresponding to the ultrasonic frequency, otherwise, side lobes will appear in the sound field. For example, an ultrasonic frequency of 40kHz, a screen sounding device about 8.6mm and 0.2m wide for an acoustic wavelength would require at least 24 channels, for example, an ultrasonic frequency of 80kHz, and a screen sounding device about 4.3mm and 0.2m wide for an acoustic wavelength would require at least 47 channels. Therefore, the method of adjusting the phase of each channel by adopting multi-channel signal processing requires a larger number of channels, which results in an increase in complexity and cost of the system.
Accordingly, there is a need for an improvement over the prior art to overcome the deficiencies described in the prior art.
Disclosure of Invention
The object of the invention is to provide an efficient and directionally deflectable directional sound screen.
In order to achieve the above object, the present invention provides a directional sound-emitting screen which is efficient and directional and is deflectable, comprising a vibration layer and a non-vibration layer attached to the frame of the vibration layer, wherein an air gap for the vibration layer to vibrate up and down is formed between the vibration layer and the non-vibration layer, a first conductive pattern is formed on the surface of the vibration layer, which is close to the non-vibration layer, the first conductive pattern comprises a plurality of first conductive channels, each first conductive channel extends and distributes along a first direction, and the first conductive channels are insulated and spaced; a second conductive pattern is formed on the surface, close to the vibration layer, of the non-vibration layer, the second conductive pattern comprises a plurality of second conductive channels, each second conductive channel extends and is distributed along a second direction, and the second conductive channels are insulated and spaced; the first direction and the second direction are crossed, after the vibration layer is attached to the non-vibration layer, the first conductive channels on the vibration layer and the second conductive channels on the non-vibration layer are crossed and overlapped to form a plurality of sounding areas, and each sounding area independently sounds and/or randomly makes up sounding with at least one other sounding area under the driving of an external driving signal.
In a preferred embodiment, the first direction is a horizontal direction, and the second direction is a vertical direction or is inclined to the horizontal direction; or the second direction is a horizontal direction, and the first direction is a vertical direction or is inclined to the horizontal direction; or the first direction and the second direction are both inclined to the horizontal direction.
In a preferred embodiment, the first direction and the second direction are perpendicular.
In a preferred embodiment, the first conductive channels are isolated by a first non-conductive layer, the second conductive channels are isolated by a second non-conductive layer, and edges of the first non-conductive layer and the second non-conductive layer are straight or curved.
In a preferred embodiment, the first non-conductive layer is composed of a plurality of connected and repeated first sub-non-conductive layers, each first sub-non-conductive layer includes a first line segment, a second line segment, a third line segment and a fourth line segment, which are sequentially connected, the first line segment is in an arc shape extending along a first direction and protruding toward a dot, the second line segment is in an arc shape extending along the first direction and recessed toward the dot, the third line segment is in an arc shape extending along the first direction and recessed toward the dot, the fourth line segment is in an arc shape extending along the first direction and protruding toward the dot, and the line segment formed by connecting the first line segment and the second line segment is axisymmetric to the line segment formed by connecting the third line segment and the fourth line segment about an axis perpendicular to the first direction; the second non-conductive layer is composed of a plurality of second sub-non-conductive layers which are connected and repeated, each second sub-non-conductive layer comprises a fifth line segment and a sixth line segment which are sequentially connected, the fifth line segment is in an arc shape which extends along a second direction and protrudes to a round point, the sixth line segment is in an arc shape which extends along the second direction and is concave to the round point, and the fifth line segment and the sixth line segment are symmetrical about the center of a connecting point of the fifth line segment and the sixth line segment.
In a preferred embodiment, the first conductive pattern forming process includes: forming a first conductive layer on the surface of the vibration layer, exposing and developing the first conductive layer through an exposing and developing etching process, and etching the first conductive channel; the second conductive pattern forming process includes: and forming a second conductive layer on the surface of the non-vibration layer, and carrying out exposure development on the second conductive layer through an exposure development etching process to etch the second conductive channel.
In a preferred embodiment, the width of the first non-conductive layer and the second non-conductive layer is 50um or less.
In a preferred embodiment, each first conductive channel and each second conductive channel are controlled by a separate driving signal, and each sound-producing area is independently produced and/or randomly produced in combination with at least one other sound-producing area under the driving of an external driving signal by inputting a corresponding driving signal to the conductive channel combination.
In a preferred embodiment, the directional sound-emitting screen further comprises a supporting structure and an insulating layer, wherein the supporting structure and the insulating layer are positioned between the vibrating layer and the non-vibrating layer, the supporting structure and the insulating layer are made of insulating materials doped with nonpolar molecules and symmetrical molecules, and the vibrating layer and the non-vibrating layer are fixed through the supporting structure.
In a preferred embodiment, the vibration layer includes a touch composite layer, the touch composite layer includes a vibration substrate layer and a touch layer attached to a surface of the vibration substrate layer near the non-vibration layer, and the first conductive pattern is formed on the surface of the touch layer near the non-vibration layer.
In a preferred embodiment, the touch composite layer further comprises a cover sheet layer, which is a CPI (polyimide) layer or a composite UTG (ultra thin glass) layer.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the plurality of conductive channels are formed on the vibrating layer and the non-vibrating layer of the directional sound-emitting screen, and are overlapped to form the plurality of sound-emitting areas after the vibrating layer and the non-vibrating layer are overlapped, and the directional deflectable of the directional sound-emitting screen is realized by singly or combined sound-emitting driving of the sound-emitting areas, so that the human ear tracking is realized, and compared with the traditional scheme of realizing directional deflection by adjusting the time delay and the phase of each channel, the realization complexity is reduced, so that the cost is reduced; in addition, because the sounding area can be independently controlled, the size of the whole sounding area can be controlled according to the size of the screen and the minimum sounding area of the directional sounding, the power consumption required by the whole directional sounding screen can be reduced under the condition of ensuring the sound pressure level of the whole directional sounding screen, and the service life of the whole product is prolonged.
2. According to the invention, the conductive patterns are designed, so that the sounding area is approximately circular, and the sounding efficiency of the directional sounding screen is maximized and the system power is minimized.
3. The invention combines the design of directional deflection of the directional sound emitting screen and controllable size of the sound emitting area with the touch control layer, so that the directional sound emitting screen can realize directional deflection and improved sound emitting efficiency and simultaneously realize directional sound emitting and touch control functions.
Drawings
FIG. 1 is a schematic diagram of a first conductive pattern (one embodiment) on a vibration layer according to the present invention;
FIG. 2 is a schematic diagram of a second conductive pattern (one embodiment) on a non-vibration layer according to the present invention;
FIG. 3 is a schematic diagram of a sound-emitting region (in one embodiment) formed by bonding a vibration layer and a non-vibration layer according to the present invention;
FIG. 4 is a schematic diagram of the structure of the conductive pattern (another embodiment) on the vibrating/non-vibrating layer according to the present invention;
FIG. 5 is a schematic view of the structure of a first conductive pattern (preferred embodiment) on the vibration layer of the present invention;
FIG. 6 is a schematic diagram of the structure of a second conductive pattern (preferred embodiment) on a non-vibrating layer according to the present invention;
FIG. 7 is a schematic diagram of a sound-emitting area (in a preferred embodiment) formed by bonding a vibration layer and a non-vibration layer according to the present invention;
FIG. 8 is a schematic diagram of a directional sound emitting screen according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a touch composite layer according to an embodiment of the invention;
FIG. 10 is a schematic structural diagram of a touch composite layer according to another embodiment of the present invention;
FIG. 11 is a schematic diagram of a composite layer UTG (with first edge traces and an edge insulating layer) according to an embodiment of the invention;
fig. 12 is a schematic structural diagram of a UTG composite layer (with first edge traces and first overall insulation layer) according to another embodiment of the invention.
The reference numerals are:
1. vibration layer, 11, touch composite layer, 111, vibration film, 112, touch layer, 1121, touch substrate layer, 1122, touch upper conductive layer, 1123, touch lower conductive layer, 1124, signal interference preventing layer, 113, cover plate layer, 1131, UTG layer, 1132, splash preventing layer, 1133, warp preventing coating, 12, first edge trace, 13, support structure, 14, edge insulating layer, 15, first whole surface insulating layer, 2, non-vibration layer, 21, support substrate layer, 22, second edge trace, 23, second whole surface insulating layer, 24, fixed layer, 3/31, sounding region, 4, first conductive channel, 41, conductive region, 5, first conductive layer, 6, first non-conductive layer, 61, first sub-non-conductive layer, 611, first line segment, 612, second line segment, 613, third line segment, 614, fourth line segment, 7, second conductive channel, 71, conductive region, 8, second conductive layer, 9, second non-conductive layer, 91, third line segment, 912, fifth line segment, and sixth non-conductive layer.
Detailed Description
The following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 1 to 8, the high-efficiency and directional deflectable directional sound generating screen disclosed by the invention comprises a vibration layer 1 and a non-vibration layer 2, wherein a first conductive pattern is formed on the surface of the vibration layer 1, which is close to the non-vibration layer 2, a second conductive pattern is formed on the surface of the non-vibration layer 2, which is close to the vibration layer 1, and after frames of the vibration layer 1 and the non-vibration layer 2 are attached, the first conductive pattern and the second conductive pattern are overlapped in a crossing manner to form a plurality of sound generating areas 3, and each sound generating area 3 can generate sound independently and/or generate sound with other at least one sound generating area 3 in a combination way under the driving of an external driving signal, so that the directional deflection and the maximized sound generating efficiency of sound waves are realized.
Specifically, as shown in fig. 1 and 3 to 5, the first conductive pattern includes a plurality of first conductive channels 4, each first conductive channel 4 extends and distributes along a first direction, and two adjacent first conductive channels 4 are spaced apart from each other in an insulating manner. In practice, the first conductive layer 5 is formed on the surface of the vibration layer 1, which is close to the non-vibration layer 2, and then the first conductive layer 5 is exposed and developed by an exposure, development and etching process, and a plurality of first non-conductive layers 6 are etched, wherein the plurality of first non-conductive layers 6 divide the first conductive layer 5 to form a plurality of first conductive channels 4, that is, a first conductive pattern is formed on the vibration layer 1, and two adjacent first conductive channels 4 are isolated by a first non-conductive layer 6. Also, as shown in fig. 2, 6 and 7, the second conductive pattern includes a plurality of second conductive vias 7, each second conductive via 7 extends in the second direction and is spaced apart from adjacent second conductive vias 7 in an insulating manner. In practice, the second conductive layer 8 is formed on the surface of the non-vibration layer 2 near the vibration layer 1, then the second conductive layer 8 is exposed and developed by the exposure, development and etching process, and a plurality of second non-conductive layers 9 are etched, the second conductive layers 8 are divided into a plurality of second conductive channels 7 by the plurality of second non-conductive layers 9, that is, second conductive patterns are formed on the non-vibration layer 2, and two adjacent second conductive channels 7 are isolated by a second non-conductive layer 9.
In implementation, the first conductive layer 5 and the second conductive layer 8 may be any one or a combination of two or more of nano silver, indium tin oxide, metalmesh, carbon nanotubes, graphene, and the like, or may be a non-transparent conductive material: such as copper, copper doped oxide, silver, gold, or the like, or a combination of any two or more thereof. The lower the sheet resistance of the first conductive layer 5 and the second conductive layer 8 is, the higher the sound production efficiency of the whole directional sound-producing screen is, and the material with the sheet resistance lower than 10 ohms is preferable for both conductive layers. The first conductive layer 5 and the second conductive layer 8 may be formed on the respective corresponding layers by various methods such as coating, screen printing, etc., which is not limited in the present invention.
Preferably, the first direction and the second direction are intersected, so that the first conductive channel 4 and the second conductive channel 7 can be intersected after the vibration layer 1 and the non-vibration layer 2 are attached, and thus a plurality of sound generating areas 3 can be formed. In the implementation, the first direction and the second direction are preferably perpendicular, and if the first direction is a horizontal direction, the second direction is a vertical direction, or if the second direction is a horizontal direction, the first direction is a vertical direction, or both the first direction and the second direction are inclined to the horizontal direction and are perpendicular to the horizontal direction. As shown in fig. 1, a plurality of first conductive channels 4 are formed on the vibration layer 1 at regular intervals in the vertical direction, each first conductive channel 4 extends in the horizontal direction, and two adjacent first conductive channels 4 are insulated and isolated by the etched first non-conductive layer 6. As shown in fig. 2, a plurality of second conductive channels 7 are formed on the non-vibration layer 2 at regular intervals along the horizontal direction, each second conductive channel 7 extends along the vertical direction, and two adjacent second conductive channels 7 are insulated and isolated by the etched second non-conductive layer 9. Thus, as shown in fig. 3, after the vibration layer 1 and the non-vibration layer 2 are attached, the first conductive channels 4 on the vibration layer 1 and the second conductive channels 7 on the non-vibration layer 2 are overlapped in a crossing manner to form a plurality of sounding regions 3, in this embodiment, n×m sounding regions 3 are generally formed, where n is the number of the first conductive channels 4, m is the number of the second conductive channels 7, and both are integers greater than 0. That is, if 16 first conductive paths 4 are provided on the vibration layer 1 and 16 second conductive paths 7 are provided on the non-vibration layer 2, the two paths are bonded to each other to form the 16×16 sound emitting region 3. As also shown in fig. 4, the first conductive channel 4 on the vibration layer 1 is inclined to the horizontal direction, i.e. not the horizontal direction, and has a certain turning angle, so that the design can increase the visual effect of the directional sound-emitting screen, for example, in one embodiment, if the turning angle is 45 °, the backlight is incident from a position far away from the client side on the display screen, and the visual difference caused by optical refraction and reflection of moire and the like is minimum, so that the visual effect is the highest.
Of course, the edges of the first non-conductive layer 6 and the second non-conductive layer 9 are straight, and in other alternative embodiments, the edges may be curved. In a curve, as shown in fig. 5 to 7, in a preferred embodiment of the present invention, the first non-conductive layer 6 and the second non-conductive layer 9 are each curved with a certain line width, specifically, the first non-conductive layer 6 is composed of a plurality of connected and repeated first sub non-conductive layers 61, each first sub-non-conductive layer 61 includes a first line segment 611, a second line segment 612, a third line segment 613 and a fourth line segment 614 which are sequentially connected and have a certain line width, wherein the first line segment 611 is a circular arc extending along the first direction and protruding to a dot, the second line segment 612 is a circular arc extending along the first direction and recessed to a dot, the third line segment 613 is a circular arc extending along the first direction and recessed to a dot, the fourth line segment 614 is a circular arc extending along the first direction and protruding to a dot, and the line segments formed by connecting the first line segment 611 and the second line segment 612 are axisymmetric to the line segment 613 and the fourth line segment 614 about an axis perpendicular to the first direction. In this embodiment, the first line segment 611 to the fourth line segment 614 are each 1/4 arc-shaped, and each first sub-non-conductive layer 61 is approximately shaped as a cross bracket "{" shape. Thus adjacent twoThe first conductive channels 4 are formed between the non-conductive layers 6, and the first conductive channels 4 are composed of a plurality of conductive areas 41 which are distributed at intervals along the first direction and are approximately sweet potato-shaped. The second non-conductive layer 9 is composed of a plurality of second sub non-conductive layers 91 that are connected and repeated, each second sub non-conductive layer 91 includes a fifth line segment 911 and a sixth line segment 912 that are connected in sequence and have a certain line width, wherein the fifth line segment 911 is in a circular arc shape that extends along the second direction and protrudes to a round point, the sixth line segment 912 is in a circular arc shape that extends along the second direction and is concave to a round point, and the fifth line segment 911 and the sixth line segment 912 are symmetrical about the center of the connecting point of the two, in this embodiment, the fifth line segment 911 and the sixth line segment 912 are each in a 1/2 circular arc shape, each second sub non-conductive layer 91 is approximately in a vertically arranged sinusoidal shape, such that a second conductive channel 7 is formed between two adjacent second non-conductive layers 9, and the second conductive channel 7 is also composed of a plurality of conductive areas 71 that are distributed along the second direction at intervals and are approximately in a sweet potato shape. Thus, after the vibration layer 1 is attached to the non-vibration layer 2, the first conductive channels 4 and the second conductive channels 7 can be overlapped to form a plurality of sweet potato-shaped sounding areas 3, the area of the conductive channels can be utilized to the greatest extent by the design, namely, the design of the conductive patterns can realize the maximum utilization of the conductive layers in unit area, so that the sounding efficiency and the system power are maximized. Of course, the positions of the first non-conductive layer 6 and the second non-conductive layer 9 may be interchanged, for example, the first non-conductive layer 6 having the above-mentioned shape is provided on the non-vibration layer 2, and the second non-conductive layer 9 having the above-mentioned shape is provided on the vibration layer 1, which is not limited in the present invention. In practice, the radius of the circle corresponding to each line segment can be determined according to practical needs, if the radius is 1cm, the area of the area surrounded by the sounding area 31 is 8cm 2 。
When driving, each first conductive channel 4 is connected with a driving signal, and each second conductive channel 7 is also connected with a driving signal, so that if the corresponding sounding region 3 is to be driven to sound, only the conductive channel corresponding to the sounding region 3 needs to be connected with the corresponding driving signal, if the sounding region 31 in the driving diagram is to sound, the driving signals are input to the first conductive channel 4 and the second conductive channel 7, and other sounding regions 3 are the same. In this way, each sound emission area 3 may be independently controlled and/or randomly combined with at least one other sound emission area. Therefore, on one hand, the size of the whole sound-emitting area can be controlled according to the size of the screen and the minimum sound-emitting area of the directional sound-emitting, so that the power consumption required by the whole directional sound-emitting screen can be reduced under the condition of ensuring the sound pressure level of the whole directional sound-emitting screen, and the service life of the whole product can be prolonged; on the other hand, the sounding areas at the corresponding positions can be controlled to sound according to the positions of the human ears, so that the directional deflectable and human ear tracking of the directional sounding screen can be realized.
In theory, the smaller the line widths of the first and second non-conductive layers 6 and 9, the smaller the etching marks, and the higher the visualization effect of the finally formed directional sound-emitting panel, preferably 50um or less, and in the sweet potato-type design, the line widths of the non-conductive layers are preferably 20um or less, and reference is made to a Z-shaped etching line design. The width of the first conductive channel 4 and the second conductive channel 7 is determined according to the size of the finally formed directional sound emitting screen and the minimum sound emitting area of the directional sound emitting, which is not limited in the invention. In a 27 inch dimension, the width of the first conductive path 4 and/or the second conductive path 7 is 3cm to 8cm, and the number of the first conductive path 4 and/or the second conductive path 7 may be set to 16 to 32.
In a specific embodiment, as shown in fig. 8, the vibration layer 1 specifically includes a touch composite layer 11, a first conductive layer 5, a first edge trace 12 and a supporting structure 13, where the first conductive layer 5 is formed on a lower end surface of the touch composite layer 11, the first conductive layer 5 is exposed, developed and etched to form the first conductive pattern, and the first edge trace 12 is disposed on the lower end surface of the first conductive layer 5 and is disposed along a circle of an outer edge of the first conductive layer 5, and may be made of the same material as the first conductive layer 5. The supporting structure 13 is formed on the first conductive layer 5, and when in implementation, the supporting structure 13 is an insulating supporting point arranged according to an array, in a specific embodiment, the center distance between the insulating supporting points can be 3.0 mm-4.0 mm, the height can be 10-13 um, and when in implementation, the height and the center distance of the insulating supporting points can be finely adjusted according to actual needs, so that the maximum sounding efficiency can be achieved. During preparation, the supporting structure 13 can be used for screen printing the insulating supporting points on the first conductive layer 5 of the vibration layer 1 through the screen plate, then the vibration layer 1 and the non-vibration layer 2 are attached to each other in a frame, the insulating supporting points are cured after attaching, and the insulating supporting points can be cured by Ultraviolet (UV) or by heating, preferably by Ultraviolet (UV) curing, so that the productivity can be improved, the process efficiency is optimized, and the shrinkage of the vibration layer 1 is effectively prevented.
In this embodiment, the directional sound emitting screen is integrated with the touch layer. The conventional touch control layer is mainly processed so that the touch control layer can be combined with the directional sound emitting screen. In a specific embodiment, as shown in fig. 9, the touch composite layer 11 includes a vibrating membrane 111, a touch layer 112 and a cover plate layer 113 distributed from top to bottom, where the vibrating membrane 111 is attached to the touch layer 112, for example, via OCA optical adhesive, the vibrating membrane 111 may be made of PET (polyethylene terephthalate), CPI (plastic film), UTG (ultra-thin glass), and the thickness is preferably about 50um, or may be reduced to 25um as required, and the thickness of OCA optical adhesive may be 25um. The touch layer 112 may also be attached to the cover layer 113 by a fixing adhesive. The touch layer 112 may be implemented by using an existing mature touch layer structure, in a specific embodiment, the touch layer 112 may include a touch substrate layer 1121, an upper touch conductive layer 1122 and a lower touch conductive layer 1123 respectively located on the upper and lower end surfaces of the touch layer 112, and a signal interference preventing layer 1124 located on the upper end surface of the upper touch conductive layer 1122, where, in implementation, the thickness of the touch layer 112 is preferably 36um, the signal interference preventing layer 1124 may prevent signal interference between the touch layer and directional sounding, the thickness is preferably 45um, and the overall thickness of the whole touch composite layer 11 may be 150 um-200 um.
In one embodiment, as shown in fig. 9, the cover plate layer 113 preferably adopts a CPI cover plate layer, which has the advantages of low thickness, high scratch resistance of the surface, and a pencil hardness of 3 h-5 h under a load of 750 g. In implementation, the CPI cover plate layer may have a thickness of 6um to 8um, and is attached to the touch layer 112 by a fixing adhesive having a thickness of 6um to 8 um. In another alternative embodiment, as shown in fig. 10, the cover layer 113 may be a composite UTG layer, which has the advantage of higher reliability than CPI, and may be used in applications such as in-vehicle industrial control. In implementation, the thickness of the composite UTG layer may be 30um to 50um, and it may also be attached to the touch layer 112 by a fixing adhesive with a thickness of 6um to 8 um. When the cover layer 113 is a composite UTG layer, in one embodiment, as shown in fig. 11, the composite UTG layer includes a UTG layer 1131, an anti-splash layer 1132 and an anti-warp coating 1133 respectively disposed on the upper and lower ends of the UTG layer 1131, wherein the anti-splash layer 1132 and the anti-warp coating 1133 are preferably high-permeability materials with a transmittance T.T of more than 80%, and may be formed by a slit coating or a bar coating process. In another alternative embodiment, as shown in fig. 12, the composite UTG layer can also eliminate the UTG layer of warp preventing plating 1133, i.e., the first conductive layer 5 is formed directly on the lower end surface of the UTG layer 1131. Of course, in other alternative embodiments, the cover plate layer 113 may be omitted, and a hard coating layer (not shown) may be directly added on the lower end surface of the touch control layer 112, where the thickness may be 10um, and the surface pencil hardness may be 3 h-5 h under a load of 750 g.
In addition, as shown in fig. 8, the vibration layer 1 may further include an edge insulating layer 14 and/or a first whole surface insulating layer 15, where the edge insulating layer 14 covers the first edge trace 12, and the first whole surface insulating layer 15 covers the first conductive layer 5. The whole insulating layer is compared with the edge insulating layer, so that the edge section difference of the edge wiring can be effectively reduced, and the fragmentation rate of the whole vibrating layer is reduced.
The composite UTG layer may be used as the diaphragm 111.
In practice, as shown in fig. 8, the non-vibration layer 2 may specifically include a supporting substrate layer 21, a second conductive layer 8, a second edge trace 22, a second whole-surface insulation layer 23, and a fixing layer 24, where the supporting substrate layer 21 may be made of tempered glass, and in one embodiment, has a thickness of 11mm. The second conductive layer 8 is formed on the upper end surface of the supporting substrate layer 21, the second conductive layer 8 is exposed, developed and etched to form the second conductive pattern, and the second edge trace 22 is disposed on the upper end surface of the second conductive layer 8 and along the outer edge of the second conductive layer 8, and the material of the second edge trace may be the same as that of the second conductive layer 8. The second whole insulating layer 23 covers the second conductive layer 8, and the fixing layer 24 is formed on the second whole insulating layer 23 and is used for fixing the supporting structure 13 on the vibration layer 1, that is, the upper end of the supporting structure 13 is shaped on the first conductive layer 5, and the lower end is fixed with the fixing layer 24, so that the fixation of the vibration layer 1 and the non-vibration layer 2 is realized. In practice, the fixing layer 24 may be formed by using a 3D spray printing, silk screen printing, exposure and development, and the material is a material with an adhesive effect and is not sticky after being completely cured, and the main function is to fix the supporting structure 13 and the vibration layer 1/non-vibration layer 2.
Preferably, the insulating layers (including the edge insulating layer 14, the first whole surface insulating layer 15 and the second whole surface insulating layer 23) and the supporting structure 13 are preferably made of non-polar molecular and symmetrical molecular materials, such as glue, acrylic, polyester, epoxy, etc. doped with silica spheres. If not, materials with a small number of polar groups, high molecular weight and high crystallinity are preferable, such as hydrophobic gas phase inorganic silica/ETFE (ethylene-tetrafluoroethylene copolymer) with sodium iron plasma doped PPM (Parts Per Million ) of 10 or less. Such a material is subjected to an external electric field and has a low degree of polarization, and increases the support strength of the support structure 13, thereby increasing its reliability and preventing it from collapsing.
The invention has the advantages that 1, the invention forms a plurality of conductive channels on the vibrating layer 1 and the non-vibrating layer 2 of the directional sound-emitting screen, the conductive channels are overlapped to form a plurality of sound-emitting areas 3 after the vibrating layer 1 and the non-vibrating layer 2 are overlapped, and the directional deflectable of the directional sound-emitting screen is realized by singly or combined sound-emitting driving of the sound-emitting areas 3, so that the tracking of human ears is realized, and compared with the prior scheme of realizing directional deflection by adjusting the time delay and the phase of each channel, the realization complexity is reduced, thereby reducing the cost; in addition, because the sounding area can be independently controlled, the size of the whole sounding area can be controlled according to the size of the screen and the minimum sounding area of the directional sounding, the power consumption required by the whole directional sounding screen can be reduced under the condition of ensuring the sound pressure level of the whole directional sounding screen, and the service life of the whole product is prolonged. 2. According to the invention, the conductive patterns are designed, so that the sounding area 3 is approximately circular, and the sounding efficiency of the directional sounding screen is maximized and the system power is minimized. 3. The invention combines the design of directional deflection of the directional sound emitting screen and controllable size of the sound emitting area with the touch control layer, so that the directional sound emitting screen can realize directional deflection and improved sound emitting efficiency and simultaneously realize directional sound emitting and touch control functions.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. The directional sound generating screen is characterized by comprising a vibration layer and a non-vibration layer which is attached to the frame of the vibration layer, wherein an air gap for the vibration layer to vibrate up and down is formed between the vibration layer and the non-vibration layer, a first conductive pattern is formed on the surface of the vibration layer, which is close to the non-vibration layer, and comprises a plurality of first conductive channels, each first conductive channel extends and is distributed along a first direction, and the first conductive channels are insulated and spaced; a second conductive pattern is formed on the surface, close to the vibration layer, of the non-vibration layer, the second conductive pattern comprises a plurality of second conductive channels, each second conductive channel extends and is distributed along a second direction, and the second conductive channels are insulated and spaced; the first direction and the second direction are crossed, after the vibration layer is attached to the non-vibration layer, the first conductive channels on the vibration layer and the second conductive channels on the non-vibration layer are crossed and overlapped to form a plurality of sounding areas, and each sounding area independently sounds and/or randomly makes up sounding with at least one other sounding area under the driving of an external driving signal.
2. A high efficiency, directionally deflectable directional sound screen as recited in claim 1, wherein said first direction is horizontal and said second direction is vertical or oblique to horizontal; or the second direction is a horizontal direction, and the first direction is a vertical direction or is inclined to the horizontal direction; or the first direction and the second direction are both inclined to the horizontal direction.
3. An efficient and directionally deflectable directional sound screen as in claim 1 or 2 wherein said first and second directions are perpendicular.
4. An efficient and directionally deflectable directional sound screen as recited in claim 1, wherein said first conductive channels are separated by a first non-conductive layer and said second conductive channels are separated by a second non-conductive layer, and wherein the edges of said first and second non-conductive layers are straight or curved.
5. The high efficiency, directionally deflectable directional sound-emitting screen of claim 4, wherein the first non-conductive layer comprises a plurality of connected and repeating first sub-non-conductive layers, each of the first sub-non-conductive layers comprising a first segment, a second segment, a third segment, and a fourth segment connected in sequence, the first segment being arcuate extending in a first direction and convex toward the dots, the second segment being arcuate extending in a first direction and concave toward the dots, the third segment being arcuate extending in a first direction and concave toward the dots, the fourth segment being arcuate extending in a first direction and convex toward the dots, and the segments of the first and second segments being axisymmetric with respect to an axis perpendicular to the first direction; the second non-conductive layer is composed of a plurality of second sub-non-conductive layers which are connected and repeated, each second sub-non-conductive layer comprises a fifth line segment and a sixth line segment which are sequentially connected, the fifth line segment is in an arc shape which extends along a second direction and protrudes to a round point, the sixth line segment is in an arc shape which extends along the second direction and is concave to the round point, and the fifth line segment and the sixth line segment are symmetrical about the center of a connecting point of the fifth line segment and the sixth line segment.
6. An efficient and directionally deflectable directional sound screen as recited in claim 1, wherein said first conductive pattern forming process comprises: forming a first conductive layer on the surface of the vibration layer, exposing and developing the first conductive layer through an exposing and developing etching process, and etching the first conductive channel; the second conductive pattern forming process includes: and forming a second conductive layer on the surface of the non-vibration layer, and carrying out exposure development on the second conductive layer through an exposure development etching process to etch the second conductive channel.
7. An efficient and directionally deflectable directional sound screen as recited in claim 4, wherein said first and second non-conductive layers have a width of 50um or less.
8. An efficient and directionally deflectable directional sound screen as claimed in claim 1, wherein each of said first conductive channels and each of said second conductive channels are controlled by a separate drive signal, and each sound zone is independently sound driven by an external drive signal and/or randomly combined with at least one other sound zone by inputting a corresponding drive signal to the conductive channels.
9. The directional sound-emitting screen of claim 1, wherein the directional sound-emitting screen further comprises a support structure and an insulating layer between the vibrating layer and the non-vibrating layer, wherein the support structure and the insulating layer are made of insulating materials doped with nonpolar molecules and symmetrical molecules, and the vibrating layer and the non-vibrating layer are fixed by the support structure.
10. The high efficiency, directionally deflectable directional sound screen of claim 1, wherein the vibration layer comprises a touch composite layer comprising a vibration substrate layer and a touch layer bonded to a surface of the vibration substrate layer adjacent to the non-vibration layer, the first conductive pattern being formed on the surface of the touch layer adjacent to the non-vibration layer.
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